1、determination of astronomic longitude
天文經(jīng)度測定

2、Please do not be panic, because this is a normal astronomic phenomenon on the earth.
遇到日食，請不要驚慌，這只是正常的天文現(xiàn)象。

3、determination of astronomic latitude
天文緯度測定

4、This week there were two big developments in astronomic science.
這周天文學(xué)界有兩個大的進(jìn)展。

5、To measure astronomic distances one takes as a unit that distance which light travels in a year.
為了度量天文距離，人們把光在一年中走過的距離當(dāng)作一個距離單位。

6、determination of astronomic azimuth
天文方位角測定